Small Scale Military Headquarters

http://www.wimp.com/vortexcannon/

working example of the German AA concept.

wow, very impressive! look at the size of that thing!

Very cute. What would the range be on that thing? The outhouse of straw just seems to collapse in aheap while the stick outhouse gets thrown over. The bricks had neither supporting elements nor mortar. Would it have any effect on a real, solid building or other structure?
Still. An intriguing concept.